looks like pcm stuck at open loop and injector driver damaged caused by shorted ignition coil thank you for thank you for explanation . i like your way
I'm intrigued and awaiting part three. I'm starting to believe your lack of correction on stft is from the codes being set and the PCM performing in default regarding your circuit code. I think it's time to scope the coils. great work as always.
This fuel/02/pcm relationship is informative, but the scan codes said there is a problem with one or two ignition coils. Why was the fuel/o2/pcm system checked before the coils?
Im thinking intake gasket is causing vacuum leak thus low vacuum reading. No bobbing needle so crank and cam in time. Belt has not slipped. The no response on short term fuel trim is odd. Could this be a bad pcm? Will see in part 3
possible open loop also the vacuum gauge is a map sensor low vacuum means higher pressure in intake manifold plugged exhaust? looking forward to part 3
Yeah, I've never seen a PCM go bad, but leave it to Ford to let that happen in their luxury line. Could be a cap has blown inside the PCM, probably it's accessible from the engine bay and road grime has gotten past the junk seal they used on it and caused problems internally. Also, I just searched for "Lincoln LS PCM" on Google, someone said that a bad coil pack can actually damage the PCM on these vehicles. That's a poor design, I've never heard of a failing coil pack backfeeding into the car's computer.
My PCM went bad in my 1989 Oldsmobile 88. The car would die all the time and hesitate. All sensors were good nobody could figure it out. When it was on jack stands in gear idling at about 15MPH (on the spedo) the scanner was reading 60 MPH and that is how it was diagnosed.
BassManBobBassCovers He said one of the circuits inside the PCM (I think it might have been the ICM which is integrated into the PCM) had failed because of the coil pack going bad and backfeeding into the PCM. Like I said though, that's a bad design, they could have put diodes in there to limit the backfeed of current and it would have kept the PCMs from frying.
i think you made a mistake on testing the fuel trims. the pcm has shut down 3 injectors so the engine is pumping air into the exhaust from 3 cylinders!!!!... 3 cylinders!!!...how can you use the oxygen sensors to set fuel trim?! you did not even look to see it the engine was in open or closed loop.
Another great video.
looks like pcm stuck at open loop and injector driver damaged caused by shorted ignition coil
thank you for thank you for explanation . i like your way
I'm intrigued and awaiting part three. I'm starting to believe your lack of correction on stft is from the codes being set and the PCM performing in default regarding your circuit code. I think it's time to scope the coils. great work as always.
This fuel/02/pcm relationship is informative, but the scan codes said there is a problem with one or two ignition coils. Why was the fuel/o2/pcm system checked before the coils?
Good one. Very informative stuff
Im thinking intake gasket is causing vacuum leak thus low vacuum reading. No bobbing needle so crank and cam in time. Belt has not slipped. The no response on short term fuel trim is odd. Could this be a bad pcm? Will see in part 3
excellent video as always
thanks
possible open loop also the vacuum gauge is a map sensor low vacuum means higher pressure in intake manifold plugged exhaust? looking forward to part 3
I don't think it's a bad PCM but the PCM has a specific job to do and it's not doing that.... so.... waiting for part 3.
Yeah, I've never seen a PCM go bad, but leave it to Ford to let that happen in their luxury line. Could be a cap has blown inside the PCM, probably it's accessible from the engine bay and road grime has gotten past the junk seal they used on it and caused problems internally.
Also, I just searched for "Lincoln LS PCM" on Google, someone said that a bad coil pack can actually damage the PCM on these vehicles. That's a poor design, I've never heard of a failing coil pack backfeeding into the car's computer.
I'm still thinking it is related to the ignition control module. Not showing proper fuel trim maybe because the PCM is cutting fuel. Not sure..
My PCM went bad in my 1989 Oldsmobile 88. The car would die all the time and hesitate. All sensors were good nobody could figure it out. When it was on jack stands in gear idling at about 15MPH (on the spedo) the scanner was reading 60 MPH and that is how it was diagnosed.
BassManBobBassCovers He said one of the circuits inside the PCM (I think it might have been the ICM which is integrated into the PCM) had failed because of the coil pack going bad and backfeeding into the PCM.
Like I said though, that's a bad design, they could have put diodes in there to limit the backfeed of current and it would have kept the PCMs from frying.
Is it just me but cam sensors signals look weird to me or is it just zoom in ?
Love these videos ! Where did you get your propane wand ?
WoW .. Good job
Good stuff!!!
i think you made a mistake on testing the fuel trims. the pcm has shut down 3 injectors so the engine is pumping air into the exhaust from 3 cylinders!!!!... 3 cylinders!!!...how can you use the oxygen sensors to set fuel trim?! you did not even look to see it the engine was in open or closed loop.
thank you
Banana in the pipes?
throttle body by wire and map
Can't find part 3😰
hi